Singapore, which has unleashed some S$93 billion (US$68 billion) of stimulus measures this year, said on Monday it would spend a further S$8 billion (US$5.8 billion) to extend a wage subsidy programme to next March, as most sectors continue to struggle amid the coronavirus pandemic.The Deputy Prime Minister and Finance Minister Heng Swee Keat said the government hoped extending the scheme by up to seven months would help companies retain as many workers as possible.Unemployment in the republic…